Iran accused the United States on Saturday of violating their deal to end the Middle East war and hit US targets in the Gulf in retaliation for US strikes on Iranian territory. The exchange of fire, which came after Washington accused Tehran of attacking a cargo ship in the Strait of Hormuz, raised doubts about efforts to keep the crucial waterway open while both sides negotiate a final deal. Israel, meanwhile, launched strikes in Lebanon and Hezbollah's leader Naim Qassem rejected a deal to end the conflict that has also threatened to derail the wider US-Iran peace effort.